Three new water supply boreholes have been drilled in Harrogate and extend the available information on the hydrogeology of the mineral water springs. The water chemistry, combined with the geological evidence, shows that they tap waterat the opposite ends of the mineralized groundwater evolution system. Groundwater chemistry in the recharge area is available for the first time and there is new evidence that the deep migration of mineralized waters extends further than has been found hitherto. A conceptual model for the groundwater circulation system has been developed and a possible source of the high sodium chloride content is postulated.

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